Tiling priorities in Android Webview.

android_webview/browser/browser_view_renderer.h

Index: android_webview/browser/browser_view_renderer.h
diff --git a/android_webview/browser/browser_view_renderer.h b/android_webview/browser/browser_view_renderer.h
index 338b31d73e40698f4f36fd9533f78f141b3f7f6f..e7dcc957a31dcd5363808870d42b8e6b65cb3899 100644
--- a/android_webview/browser/browser_view_renderer.h
+++ b/android_webview/browser/browser_view_renderer.h
@@ -140,12 +140,13 @@ class BrowserViewRenderer : public content::SynchronousCompositorClient,
   virtual void SetNumTiles(size_t num_tiles,
                            bool effective_immediately) OVERRIDE;
 
- private:
-  void SetTotalRootLayerScrollOffset(gfx::Vector2dF new_value_dip);
   // Checks the continuous invalidate and block invalidate state, and schedule
   // invalidates appropriately. If |force_invalidate| is true, then send a view
   // invalidate regardless of compositor expectation.
   void EnsureContinuousInvalidation(bool force_invalidate);
+
+ private:
+  void SetTotalRootLayerScrollOffset(gfx::Vector2dF new_value_dip);
   bool OnDrawSoftware(jobject java_canvas);
   bool CompositeSW(SkCanvas* canvas);
   void DidComposite();
@@ -199,6 +200,11 @@ class BrowserViewRenderer : public content::SynchronousCompositorClient,
   gfx::Vector2d last_on_draw_scroll_offset_;
   gfx::Rect last_on_draw_global_visible_rect_;
 
+  // The clip and transform from the parent compositor. These are only used for
+  // tiling priority.
+  gfx::Rect parent_clip_;

[boliu, 2014/07/29 19:02:41]

Remove

[hush (inactive), 2014/07/29 21:14:21]

Done.

+  ParentCompositorDrawConstraints parent_draw_constraints_;
+
   // When true, we should continuously invalidate and keep drawing, for example
   // to drive animation. This value is set by the compositor and should always
   // reflect the expectation of the compositor and not be reused for other